1 files changed, 15 insertions, 3 deletions

diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index f58b7d850114..34cc3c590aa5 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -822,7 +822,18 @@ static void tun_net_uninit(struct net_device *dev)
 /* Net device open. */
 static int tun_net_open(struct net_device *dev)
 {
+        struct tun_struct *tun = netdev_priv(dev);
+        int i;
+
         netif_tx_start_all_queues(dev);
+
+        for (i = 0; i < tun->numqueues; i++) {
+                struct tun_file *tfile;
+
+                tfile = rtnl_dereference(tun->tfiles[i]);
+                tfile->socket.sk->sk_write_space(tfile->socket.sk);
+        }
+
         return 0;
 }
 
@@ -1103,9 +1114,10 @@ static unsigned int tun_chr_poll(struct file *file, poll_table *wait)
         if (!skb_array_empty(&tfile->tx_array))
                 mask |= POLLIN | POLLRDNORM;
 
-        if (sock_writeable(sk) ||
-            (!test_and_set_bit(SOCKWQ_ASYNC_NOSPACE, &sk->sk_socket->flags) &&
-             sock_writeable(sk)))
+        if (tun->dev->flags & IFF_UP &&
+            (sock_writeable(sk) ||
+             (!test_and_set_bit(SOCKWQ_ASYNC_NOSPACE, &sk->sk_socket->flags) &&
+              sock_writeable(sk))))
                 mask |= POLLOUT | POLLWRNORM;
 
         if (tun->dev->reg_state != NETREG_REGISTERED)